Polishing-cloth.



WALTER DAG-HALL, OF FAIRFIELD, HAMPTON WICK, ENGLAND,

Patented May '7, 1912.

POLISHING-CLOTH.

1,@25,382, Specification of Letters Patent.

No Drawing.

' Application filed February 20, 1911. Serial No. 609,888.

To all whom it may concern:

Be it known that I, WALTER DAGNALL, a subject of the King of GreatBritain, resident of Fair-field, Sandy Lane, Hampton Wick, in the countyof Middlesex and Kingdom of Great Britain, have invented new and usefulImprovements in Polishing- Cloths, of which the following is aspecification.

This invention relates to improvements in the manufacture of polishingcloths 0r fabrics which are impregnated with a mixture of Wax, tallow orthe like, and oil, caustic alkali or borax or silicate of soda, spiritand a polishing powder, the wax, tallow and oil being first heatedtogether and then saponified by the alkali, after which the polishingpowder is added and finally the spirit.

In practice it is found that cloths impregnated with the mixture asabove described are not well adapted for cleaning articles that are verydirty or tarnished or have been laid by for a considerable length oftime or exposed to the air or to injurious fumes, the reason being thatthe fatty acids which have great cleaning properties have been wholly orpartially neutralized by the added alkaline salt or alkali. Moreover inpractice it is found that the addition of wax or tallow to such mixtureproduces a cloth not so easy or fluent in action as is in some casesrequired. According to this invention therefore the alkaline salt oralkali is dispensed with so as entirely to avoid any neutralization ofthe fatty acid employed thus producing a cloth with a distinctly acidreaction. The fatty acid employed is known commercially as olein,whichword throughout this specification is used to denote commercial oleicacid. To produce a cloth particularly easy or fluent in action, the waxor t'allow may be omit-ted;

A. convenient way of carrying out the invention is as follows :Takeolein, with Wax and (or) tallow if required, and heat it or them in asuitable vessel. Then add powdered silicate of aluminium, and stir themixture. The mixture is then thinned by the addition of petrol, toinsure that the mixture shall penetrate the cloth intimately, afterwhich the cloth is drawn through the mixture, and then passed betweenrollers to insure that the saturation of the cloth shall be evenanduniform. No heat is used to dry the cloths, the petrol being allowedto evaporate at normal temperatures, after serving its purpose as avehicle for securing thorough penetration of the mixture into the cloth,thus leaving the other ingredients securely fixed in the cloth, which isthen cut into pieces of suitable size ready for use.

The following proportions of the impregnating ingredients are found togive good results in practice, viz.64 lbs. of olem, 8 lbs. of wax, 8lbs. of talloW, 64 lbs. of silicate of aluminium. The quantity ofsolvent required varies greatly with the extent of the cleaning andpolishing power required in the cloth to be impregnated. If desired,either the wax or the tallow or both may be omitted.

The cloth can be manufactured of cotton,

